// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// CPU specific code for ppc independent of OS goes here.

#if V8_TARGET_ARCH_PPC

#include "src/cpu-features.h"

#define INSTR_AND_DATA_CACHE_COHERENCY LWSYNC

namespace v8 {
namespace internal {

    void CpuFeatures::FlushICache(void* buffer, size_t size)
    {
#if !defined(USE_SIMULATOR)
        if (CpuFeatures::IsSupported(INSTR_AND_DATA_CACHE_COHERENCY)) {
            __asm__ __volatile__(
                "sync \n"
                "icbi 0, %0  \n"
                "isync  \n"
                : /* no output */
                : "r"(buffer)
                : "memory");
            return;
        }

        const int kCacheLineSize = CpuFeatures::icache_line_size();
        intptr_t mask = kCacheLineSize - 1;
        byte* start = reinterpret_cast<byte*>(reinterpret_cast<intptr_t>(buffer) & ~mask);
        byte* end = static_cast<byte*>(buffer) + size;
        for (byte* pointer = start; pointer < end; pointer += kCacheLineSize) {
            __asm__(
                "dcbf 0, %0  \n"
                "sync        \n"
                "icbi 0, %0  \n"
                "isync       \n"
                : /* no output */
                : "r"(pointer));
        }

#endif // !USE_SIMULATOR
    }
} // namespace internal
} // namespace v8

#undef INSTR_AND_DATA_CACHE_COHERENCY
#endif // V8_TARGET_ARCH_PPC
